Discovery - Upgrade Bitnami Postgresql to the latest 15.x helm chart

Bug

Description

• Big Bang has a renovate process that is looking for the latest helm chart and releases. In this issue we are seeing that the bitnami/postgresql helm chart in behind running on 12.12.10 (IB image tag = ^15.5). Renovate and BB process is looking for the latest helm chart version 15.x.x (IB image tag = 16.2.0)
• Work with the Holocron development team to migrate to the latest bitnami/postgresql chart that has an image in Iron Bank.

Provide any steps possible used to reproduce the error (ideally in an isolated fashion).

BigBang Version

What version of BigBang were you running?

• BB = bigbang-2.26.0
• Current postgresql image = registry1.dso.mil/ironbank/opensource/postgres/postgresql:15.6
• Proposed postgresql image = registry1.dso.mil/ironbank/bitnami/postgres:16.2.0
• Proposed Bitnami helm chart version = 15.2.10

This can be retrieved multiple ways:

# via helm
helm ls -n bigbang

# via the deployed umbrella git tag
kubectl get gitrepository -n bigbang